Ruby is the red variety of corundum, colored by traces of chromium — the same mineral family as sapphire, sharing its exceptional 9/10 hardness. Fine natural rubies are among the rarest of all colored gemstones: vivid red stones over one carat are dramatically scarcer than diamonds of comparable size. Southeast Asia has produced legendary rubies for centuries, from Myanmar’s Mogok valley to the historic deposits of Thailand and Cambodia.Because rarity attracts imitations and heavy treatments, certification matters more for ruby than for almost any other gem. At GEMIC Institute, every ruby is examined by our accredited gemologists — species verification, treatment assessment, precise weight and measurements — and leaves our Siem Reap laboratory with its certificate. Listing photos and videos always show the actual stone offered.Each ruby here is a unique piece: once sold, it is gone. All orders are shipped worldwide with tracking and protected by a 30-day return policy. Looking for a particular ruby — a size, a shade, an origin? Ask our gem hunting service.